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Waterfall / Voltage Analogy If we draw an analogy to a waterfall, voltage would represent the ____________ of the waterfall: the _____________ it is, the more potential energy the water has by virtue of its distance from the bottom of the falls, and the more energy it will possess as it hits the bottom. Then _____________ represents how much water was going over the edge of the falls each second . ________________ refers to any obstacles that slows down the flow of water over the edge of the falls (e.g. rocks in the river before the edge).
Voltage Where would a charge feel the greatest force? How much work is done if a force of 10N is required to move 1C of charge .1m? What about 2C of charge? c) How much work is done per unit charge for each? d) What is the Electric Field Strength? e) How much work must be done moving an electron across a Potential Difference of 1V, 10V and 100V? A B f) How much KE would a proton have free to move across the plates from plate ‘A’ to plate ‘B’? What would be its velocity?
What are the similarities and differences between these batteries?
Electronvolt - If a proton moves downward in the presence of the E-Field, draw the field lines and label the charge on the plates. If the E-field intensity is 200N/C, what is the magnitude and direction of the force felt by each particle? Label vectors on the diagram. Calculate the acceleration of each particle in the presence of the field.. If the plates are hooked up to a 12V battery, how much work is done moving the charges across the plates between points A and C? A B C p e n d e) How much work is done in eV? What is the distance between the plates? What is the voltage between points A and B?
Electrical EnergyNet Work Done on Charge Q1: How much work is done moving the following charges across a potential difference of 100V in Joules and eV? a) 1 electrons b) 3 electrons Q2: How much work is done moving the following charges across a potential difference of 10V in Joules and eV? a) 1 proton b) 3 protons Q3: How fast would a proton and electron be moving if all the work done in part ‘a’ of each question turned into KE?
The Baghdad Battery is believed to be about 2000 years old. The jar was found in KhujutRabu just outside Baghdad and is composed of a clay jar with a stopper made of asphalt. Sticking through the asphalt is an iron rod surrounded by a copper cylinder. When filled with vinegar – or any other electrolytic solution - the jar produces about 1.1 volts.
Electroplating, the process of coating a metal object with a thin layer of another metal by means of electrolysis. Electroplating is used to give metal objects a better appearance or to protect them from corrosion, wear, or rust.
One of the enthusiastic admirers of Galvani was a university professor in Padova, Alessandro Giuseppe Antonio Anastasio Volta. He repeated Galvani's experiments many times with many different materials. From these experiments he came to the conclusion that it was the two dissimilar metals, not the frog’s leg that produced the electricity. The frog’s leg was just an indicator of presence of the electricity.
In 1800, after extensive experimentation, he developed the voltaic pile. The original voltaic pile consisted of a pile of zinc and silver discs and between alternating discs, a piece of cardboard that had been soaked in saltwater. A wire connecting the bottom zinc disc to the top silver disc could produce repeated sparks.
